How can I submit a patent assignment document to the USPTO?

There are three main ways to submit a patent assignment document to the USPTO:

1. Mail: Documents can be mailed to the address specified in 37 CFR 3.27: Mail Stop Assignment Recordation Services, Director of the United States Patent and Trademark Office, P.O. Box 1450, Alexandria, Virginia 22313-1450.
2. Fax: Documents can be submitted via facsimile, as outlined in MPEP 302.09. However, certain documents cannot be faxed, such as assignments submitted with new applications.
3. Electronic Submission: Documents can be submitted electronically through the Electronic Patent Assignment System (EPAS) as described in MPEP 302.10.

Each method has specific requirements and limitations, so it’s important to review the relevant MPEP sections or consult the USPTO website for detailed instructions.